What is the product of following reaction :

What is the product of following reaction :

1. 
   
2. 
   
3. $\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_3$
4. $\mathrm{H}_3 \mathrm{C}-\mathrm{CH}_2-\mathrm{CH}=\mathrm{CH}_2$

Solution

This is a $\mathrm{S}_{\mathrm{N}} 2$ reaction, and Walden inversion takes place in which configuration becomes opposite.

Asked in: NEET 2022 (Phase 1)

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